Stadium: Court 1 Round: 25 Ground: Hardcourt indoor
| ITF Germany F13 | 2016/10/06 11:50 | Ollert, Lukas v David Poljak | 6-7,3-6 |
| ITF Sweden F4 | 2018/09/25 11:00 | George Loffhagen v Ollert, Lukas | 6-1,6-3 |
| ITF Great Britain F5 | 2018/09/18 17:00 | Ollert, Lukas v Anton Matusevich | 4-6,5-7 |
| ITF Great Britain F4 | 2018/09/13 11:10 | Ollert, Lukas v Jack Draper | 6-2,3-6,4-6 |
| ITF Great Britain F4 | 2018/09/12 10:00 | Ollert, Lukas v Butler, Samm | 6-2,6-1 |
| ITF Great Britain F4 | 2018/09/11 13:00 | Ollert, Lukas v Felix Gill | 6-2,6-0 |
| ITF France F16 | 2018/09/07 13:40 | Corentin Denolly v Ollert, Lukas | 6-3,7-5 |
| ITF France F16 | 2018/09/06 09:00 | Ollert, Lukas v Diaz-Figueroa, Christopher | 6-4,6-4 |
| ITF France F16 | 2018/09/04 07:30 | Arthur Reymond v Ollert, Lukas | 7-5,4-6,2-6 |
| Orleans, France, Qualifying | 2018/09/22 17:30 | David Poljak v Jankovits, Yannick | 3-6,4-6 |
| Istanbul, Turkey | 2018/09/10 07:30 | David Poljak v Wang, Tak Khunn | 6-4,6-7,3-6 |
| Istanbul, Turkey | 2018/09/09 10:10 | David Poljak v Khabibulin, Timur | 6-4,6-2 |
| Zhangjiagang, China | 2018/09/02 06:50 | Wu, Di v David Poljak | 6-3,6-4 |
| ITF Belarus F3 | 2018/08/24 07:00 | Vilardo, Francesco v David Poljak | 6-4,3-6,6-2 |
| ITF Belarus F3 | 2018/08/23 07:00 | Giorgio Ricca v David Poljak | 2-6,4-6 |
| ITF Belarus F3 | 2018/08/22 09:35 | Tsivadze, George v David Poljak | 3-6,3-6 |
| ITF Belarus F3 | 2018/08/21 07:00 | Zharyn, Dzianis v David Poljak | 1-6,1-6 |